body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
}

.nav-glass {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
}

.glass-card {
    background: rgba(255,255,255,0.85);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.hero-section {
    height: 90vh;
    background: linear-gradient(rgba(0,0,0,.4),rgba(0,0,0,.2)),
    url('/images/cover.jpg') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.otp-input {
    width: 45px;
    height: 55px;
    font-size: 1.5rem;
    text-align: center;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
}

.otp-input:focus {
    border-color: #0ea5e9;
    outline: none;
}

.distance-option {
    border: 2px solid #e5e7eb;
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.distance-option:hover {
    border-color: #0ea5e9;
    transform: translateY(-2px);
}
.distance-option.selected {
    background: skyblue;
    border-color: transparent;
    color: white;
    box-shadow: 0 12px 30px rgba(14, 165, 233, 0.3);
}
.distance-checkbox {
    position: absolute;
    opacity: 0;
    pointer-events: auto;
    width: 0;
    height: 0;
}
.required-field::after {
    content: " *";
    color: #ef4444;
}

/* Popup */
#customPopup {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.55);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}

#customPopup > div {
    background: #fff;
    padding: 1.5rem 2rem;
    border-radius: 16px;
    max-width: 380px;
    text-align: center;
}


.register-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 36px;
    font-size: 1.2rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, #0ea5e9, #2563eb);
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 10px 30px rgba(37,99,235,.4);
    animation: pulseGlow 2s infinite;
    transition: transform .25s ease;
}

.register-cta-btn:hover {
    transform: translateY(-4px) scale(1.03);
    color: #fff;
}

@keyframes pulseGlow {
    0% { box-shadow: 0 0 0 rgba(37,99,235,.5); }
    70% { box-shadow: 0 0 25px rgba(37,99,235,.8); }
    100% { box-shadow: 0 0 0 rgba(37,99,235,.5); }
}